Easy, the fourth vector (D) be opposite the sum of the other three non-coplanar vectors (A , B, C).
0=A + B + C + D where D = -(A + B + C).
Assuming you want non-zero vectors, two opposing vectors will give a resultant of zero.
Yes.
Two vectors: no. Three vectors: yes.
No.
Two vectors, no; three vectors yes.
Assuming you want non-zero vectors, two opposing vectors will give a resultant of zero.
a resultant vector
Yes.
No.
Two vectors: no. Three vectors: yes.
Two vectors: no. Three vectors: yes.
No.
No. The tenth vector would have to be matched by one equal and opposite vector to yield a zero resultant, or by multiple vectors in the second plain collectively yielding a zero resultant for that plane. It would be possible, for example, for 8 vectors to be on the same plane and two on a different plane to give a zero resultant.
Two vectors, no; three vectors yes.
No.
Two - if you add two vectors of equal magnitude but in opposite directions, the resultant vector is zero.
There is no minimum.